Cushioning device for valves.



NO. 707,!60. Patentad Aug. 19, !902.

' E. HOST.

CUSHIDNING DEVCE FOR VALVES. (Application filed Sept. s, o. (No Model.) 3 sheets-sheet I.

UNITED; STATE s PA *FEN OFFIEQ j ERNST ROST, OF DRE SDEN, GERMANY.

CUSHIONING EVICE FOR VALVE-S.'

SPECIFICATION forming part of Letters Patent No. '707,160, dated August 1902. Application filed September 16. 1901. Serial No. 75,616. (No model.)

TO all whom it rmy co wermi V Be it known that I, ERNSTROST, a subject of the German Emperor-;anija resident of Dresden, Germany, have invented certain newand useful Improvements in Cushioning Devices for Avoiding the Shocks Caused by Valves Falling upon Their Seats, ofwhich the fol-' lowing is a' specificatiom: j l v My inventionrelates to certain new and useful improvements in devices for avoiding the shocks eaused byvalves falling upon their seats, and broadly has'for its'objectthe provision ;of novel means "whereby" the valve when returning to its seat will be gradually and easily lowered without the attendance of the shock incidentto a sudden release. This object is attained by fiechanism hereinafter described, and-fully"set fort h in the claims.

In the drawings,: Figure 1 shows oneform of a practieal embodimentof my invention. Fig. 2 is a modificationthereof Fig.--3 is a section online A B,",Fig. 2. tion on line C\D,-Fig.'2. Fig; 5 shows' another form in which; my invention' may be practiced.j Fig. 6 is 'an elevation of the sleeve. Fig. 7 is a cross-section thereof. Fig. 8 is a section ona b, Fig. 5. Fig. 9 is a vertical sectional View: of a still furtherxmodification. Fig. 10 is an elevation of-thesleeve employed in said modification. 'Eigllflisa cross-section thereofi Figslzis a section-lon X Y,'Fig.

9. Fig. 13 is a' stillfurther modificatiomand Figs. 14 an'dl are detail;views-fthereofn In the drawings, Fig. 1,1the lever' gbisgc on-g nected at its oneendto the valve-stem,:which` sten is actuatedbylthe spring c.` Re1easing means a engage' thei other end of lever b.

This lever is-pivotedfasslown at,Zt, and carries an arc-shapedjproje ctionj upon its lower face. A weight his pivoted j below lever b,

as at Landcarfies an engagingface g, adapt-- ed to contact 'with the projection f. Attention should becalledtothe slight movement part f will possess upon part g by reason of the pecular shape ofpart f and itslocation with reference to t', effectually e'liminating any-sudden jar or shock upon the descent of the valve A spring l bears upon the lower face of weight hfor the purpose of creating friction, and thus retarding the motion of the weight. For the purpose offacilitating the return of the weight after the valve has been Fig. 4: is a see-' raised a spring mis provided, which upon the lowering of u the valve acts cqnjointly with;the spring Z. The backwardjm ovemen't of-the ;weightjm'aybe varied at jwillby operation' of"stop screwnyengagingpart ofgweight "hi "It' isdesirabletoreducethefshock and cause the same to beas -perfectly elastic as is possible, and in order to Carry o'itthisd-f sideratum I employ a stirrup p," (shown in Figs.{2,- 3, and 4); which carr ies'a stoppint f',

is mounted on the valve-stem, engagingnut w thereon and theupperendof the sleeve a" for the purpose of assisting the gradual movement of the'sleeve. A coil-spring z engages the weight'o'for returning the same toits position. i A stop y isprovided for limiting the rotative movement 'ofthe weight.

. Eig. 9 illustrates a device broadly opera- -tive as the one just described. In this form, however, `sleeve r'ois provided with oppositelydisposed lu gs s' u' ;which engage in contact jweightsmf gand e imparting afdirect opposite 'rotarymovenent to the weights with relation' 'toflone another'at-thedes cent of the valve. i

The stemin' 'this instanee'is also surrounded by a springen',` hearing against nut w' and sleeve r.

Fig. 13 is an illustration of stillanother form of construction wherein the threaded Valveoperate in weight'v, as shown inF igs.7 and 8, thereby rotating theweight. A springfw stern hasawedge-shaped partz'mounted there:

on, which engages with a spring h'having 'ah upwardly-bent end, the spring beingxseeured to the weight h",im parting moyem ent theref to by the downstroke of the valve 'causi`ng'the}.

wedge to contact therewith. In this construction a stop-pin u" adjusts the movement of the weight, as shown in Fig. 14:, and spring 2, Operating within a slot in the weight, tends to impart the necessary gradual movement equivalent to that given by springs l Z' pre IOO viously described in the modifications. In this form of Construction the shaft to which the weight is connected is cut away, as shown at 12. The stop-pin v" thus engages the shaft and limits its movement. By simply adjusting the height of the lower end of the stoppin the shaft may rotate to a greater or less degree, as may be desired. As shown at 14, additional means are provided whereby the rotation of the weight may be limited by adjusting the angularity of the weight with relation to the shaft.

Having thus fully described my invention, what I claim as new and useful, and desire to secure by Letters Patent, is

1. The combination with a vaive and mechanism for moving the same, of a movable ERNST ROST.

Witnesses:

PAUL ARRAS, PAUL LORENZ. 

